The article presents a patent proposition of a composite – sandwich panel made of aerogel mat and a composition of encapsulated phase-change material PCM and epoxy resin modified by glycolysis based on poly(ethylene terephthalate) waste. A multifunctional thermal insulation material with a large heat capacity was obtained. This ability makes it possible to limit the temperature fluctuation in the space encased with the composite. In addition, thanks to the use of aerogel mat, which is characterized by much higher thermal insulation than commonly available materials, it is possible to achieve the assumed thermal resistance using more than two times lower thickness of insulation. The combination of aerogel and resin-PCM makes it possible to give the material virtually any shape. After the hardening process is completed, it has incomparably greater tensile, bending and compression strengths than Styrofoam and mineral wool. These features predispose it for use in situations where high thermal insulation is required while maintaining a low thickness of insulation material and a large thermal capacity of the housing material is indicated, e.g. thin divisions used in passive buildings, window joinery elements, engine compartments and cabin components in vehicles, household appliances etc.

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